36 DRAGONFLIES OF OHIO. 



This pretty species has been taken on the herbage 

 about ponds, and flying over water, in central and 

 northern Ohio in May and July. 



Enallagma traviatum, Selys. 



Length of abdomen cT 9 24; hind wing cT 17, 9 18. 



Male blue and green. Head green, sometimes ap- 

 pearing blue, black as follows : stripe connecting the 

 bases of the antennas and the anterior ocellus, a 

 stripe behind the ocelli produced laterally and divided 

 on a level with the antenna sending one branch to the 

 antenna and another to the compound eye, this latter 

 is continued backwards along the margin of the eye 

 and returned on the posterior part of the head and so 

 surrounds the postocular spot on each side; a stripe 

 conecting, the ocelli, a dash in front of the anterior 

 ocellus and a small point each side on labrum. Thorax 

 with a mid-dorsal stripe composed of three fine lines 

 and a humeral stripe, black. Legs pale, in most 

 specimens a black line on the outer- side of all the 

 femora, abdomen blue, dark green as follows; an angu- 

 lar dorsal spot on 1, a patch strongly widened post- 

 eriorly and an apical ring on 2, whole dorsum, strongly 

 narrowed or interrupted at base, on 3-7, a triangular 

 basal patch on 8 and the wdiole dorsum of, 10. In dry 

 specimens these colors become faded and their outlines 

 are hard to follow. The superior appendages of the 

 male are much like those of aspersum, but are slightly 

 longer and narrower ; the, inferior branch on each side 

 is produced downward and inward towards the mid- 

 dle line so that the apices are separated only by about 

 the width of the superior branch. The inferiors pro- 

 trude about one third of their length beyond the apices 

 of the inferior lobe of the superiors. 



The female is colored similar to the male, but the 

 following are noticable differences. The three fine black 



